Greatest Common Factor (GCF) of 30 and 90

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To get the Greates Common Factor (GCF) of 30 and 90 we need to factor each value first and then we choose all the copies of factors and multiply them:

30:   23 5
90:   2335
GCF:   23 5

The Greates Common Factor (GCF) is:   2 x 3 x 5 = 30

 

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